The bottom border of area of loss of consciousness (tab. 3) is reached at concentration of 2300 mg/?3 - for 15 min; at concentration of 1700 mg/?3 - for 30 min; at concentration of 1200 mg/?3 - for 60 minutes

Тable 5.

Results of measurements of concentration carbon on fires

Data tab. 5 show, that more than in 90 situations of concentration CO on fires do not exceed 0,1 about. (1160 mg/?3).

Conclusions:

1. On the basis of the lead analysis based (founded, established) on numerous experimental data, it is possible to approve, that admissible norm of continuous influence on the person CO - 0,1 about. (1160 mg/?3) during evacuation up to 25 min. (GOST 12.1.004-91) is quite proved.

2. In conditions when concentration CO does not exceed admissible norm 0,1 about. (1160 mg/?3) in accordance with GOST 12.1.004-91, can be used filtering self-rescuers without protective properties from CO.

3. Filtering self-rescuers without protective properties from CO can be used for evacuation from a place of a fire not less than in 90 situations.

4. Objects on which excess of admissible concentration CO 0,1 is possible about., should be allocated for application of the self-rescuers providing protection from monoxid of carbon.

5. At a laboratory estimation of protective properties of filtering self-rescuers from CO value проскоковой concentration monoxid carbon in accordance with GOST 12.1.004-91 should be established.

The literature

1. Franc « Chemistry of poison gases », M: Chemistry, 1973, т.1, p.237.

2. Shulga V.Y., Samples Н.В., Sofronov G.А.-the Toxicological estimation of a limit of danger of a sharp intoxication of an organism оксидом carbon. The bulletin of the Russian Army medical college ?1 (14)-2005, с.218-220. 3. Harmful substances in an environment. Справочно-encyclopaedic ??na??N./under ред. V.A.Filova and др.-SPb.: NPO "Professional", 2005, p.325.

4. Lebedev V.S., Samojlov D.B., etc. the Directory of the engineer fire survive.-М.: "??oOa-engineering", 2005, с.96

5. Molchadsky I.S.fire in room.-М.: VNIIPO, 2005, p.163.

6. Robert D.Trejmen, Villiam A. Bergess, Avraam Gold. - Impurity of harmful substances in air which there are firemen. Department of scientific researches of an environment and health. The Harward school of public health, Boston, МА 02115.